Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

CHICAGO-LATROBE Jobber Length Drill Bit: #21, 135° Split Point, TiN-Coated HSS - NAS-Spec High-Speed Steel Jobber-Length Drill Bits for Aerospace
CHICAGO-LATROBENAS-Spec High-Speed Steel Jobber-Length Drill Bits for Aerospace

CHICAGO-LATROBE Jobber Length Drill Bit: #21, 135° Split Point, TiN-Coated HSS

The CHICAGO-LATROBE Jobber Length Drill Bit #21 is a NAS-Spec high-speed steel drill bit for aerospace, featuring a TiN-coated HSS construction with a 135° split point per NAS 907 Type B. It has a 0.1590-inch…

SKU 3G-OTH-190489

Brand
CHICAGO-LATROBE
Item
Jobber Length Drill Bit: #21, 135° Split Point, TiN-Coated HSS
Category
NAS-Spec High-Speed Steel Jobber-Length Drill Bits for Aerospace
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

CHICAGO-LATROBE
Manufacturer Part Number
41691
Type
TiN-Coated HSS, NAS 907 Type B
Split Point
135°

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

CHICAGO-LATROBE Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The CHICAGO-LATROBE Jobber Length Drill Bit #21 is a NAS-Spec high-speed steel drill bit for aerospace, featuring a TiN-coated HSS construction with a 135° split point per NAS 907 Type B. It has a 0.1590-inch diameter (MPN 41691). 3G Electric interprets demand and delivers this genuine industrial tool across 14 departments, with specialist depth in combustion, pumps, and controls as an authorised distributor.

Frequently Asked Questions

What is the CHICAGO-LATROBE Jobber Length Drill Bit #21 used for?

This TiN-coated HSS drill bit is designed for precision drilling in aerospace and industrial applications. It meets NAS 907 Type B specifications, making it suitable for drilling hard metals and alloys where tight tolerances and extended tool life are required.

What are the specifications of the CHICAGO-LATROBE #21 drill bit?

The CHICAGO-LATROBE Jobber Length Drill Bit #21 (MPN 41691) has a 0.1590-inch diameter, 135° split point, and TiN-coated high-speed steel construction. It conforms to NAS 907 Type B standards for aerospace-grade drilling.

Where to buy CHICAGO-LATROBE drill bits worldwide?

3G Electric supplies CHICAGO-LATROBE drill bits worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us to source this NAS-spec drill bit for your aerospace or manufacturing needs.

How to select the right CHICAGO-LATROBE drill bit for aerospace work?

For aerospace drilling, choose a bit that meets NAS 907 Type B standards, like the CHICAGO-LATROBE #21. The 135° split point reduces walking, while TiN coating extends tool life in hard metals. Match the diameter to your hole size and ensure your machine supports the required RPM.

Used in

Common applications for CHICAGO-LATROBE
Aerospace assembly — Chicago-Latrobe NAS 907 Type B aircraft-extension drill bits for drilling fastener holes in aluminum and titanium skins.
Metal fabrication — Chicago-Latrobe reduced-shank drill bit sets for enlarging holes in structural steel using magnetic drill presses.
Maintenance repair — Chicago-Latrobe left-hand cobalt jobber-length drill bits for removing broken bolts in machinery.
Tool and die making — Chicago-Latrobe jobber-length drill bit sets with 135° split point for precision hole drilling in hardened steels.
Automotive repair — Chicago-Latrobe spiral-flute screw extractors for removing seized fasteners in engine blocks or exhaust systems.
General manufacturing — Chicago-Latrobe HSS jobber-length drill bits for production drilling in mild steel and cast iron.

CHICAGO-LATROBE Products

3G Electric supplies CHICAGO-LATROBE nas-spec high-speed steel jobber-length drill bits for aerospace. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
CHICAGO-LATROBE Jobber Length Drill Bit: #20, 135° Split Point, TiN-Coated HSS, NAS 907 Type B (MPN 41690)
CHICAGO-LATROBE
CHICAGO-LATROBE Jobber Length Drill Bit: #20, 135° Split Point, TiN-Coated HSS, NAS 907 Type B (MPN 41690)
CHICAGO-LATROBE Jobber Length Drill Bit: #22, 135° Split Point, TiN-Coated HSS, NAS 907 Type B (MPN 41692)
CHICAGO-LATROBE
CHICAGO-LATROBE Jobber Length Drill Bit: #22, 135° Split Point, TiN-Coated HSS, NAS 907 Type B (MPN 41692)
CHICAGO-LATROBE Jobber Length Drill Bit: #19, 135° Split Point, TiN-Coated HSS, NAS 907 Type B (MPN 41689)
CHICAGO-LATROBE
CHICAGO-LATROBE Jobber Length Drill Bit: #19, 135° Split Point, TiN-Coated HSS, NAS 907 Type B (MPN 41689)
CHICAGO-LATROBE Jobber Length Drill Bit: #1, 135° Split Point, TiN-Coated HSS, NAS 907 Type B (MPN 41671)
CHICAGO-LATROBE
CHICAGO-LATROBE Jobber Length Drill Bit: #1, 135° Split Point, TiN-Coated HSS, NAS 907 Type B (MPN 41671)
CHICAGO-LATROBE Jobber Length Drill Bit: #24, 135° Split Point, TiN-Coated HSS, NAS 907 Type B (MPN 41694)
CHICAGO-LATROBE
CHICAGO-LATROBE Jobber Length Drill Bit: #24, 135° Split Point, TiN-Coated HSS, NAS 907 Type B (MPN 41694)
CHICAGO-LATROBE Jobber Length Drill Bit: #11, 135° Split Point, TiN-Coated HSS, NAS 907 Type B (MPN 41681)
CHICAGO-LATROBE
CHICAGO-LATROBE Jobber Length Drill Bit: #11, 135° Split Point, TiN-Coated HSS, NAS 907 Type B (MPN 41681)

More from CHICAGO-LATROBE

View all CHICAGO-LATROBE parts
CHICAGO-LATROBE Jobber Length Drill Bit: #16, 135° Split Point, Black Oxide HSS, NAS 907 Type B (MPN 45686)
CHICAGO-LATROBE
CHICAGO-LATROBE Jobber Length Drill Bit: #16, 135° Split Point, Black Oxide HSS, NAS 907 Type B (MPN 45686)
CHICAGO-LATROBE Jobber Length Drill Bit: #18, 135° Split Point, TiN-Coated HSS, NAS 907 Type B (MPN 41688)
CHICAGO-LATROBE
CHICAGO-LATROBE Jobber Length Drill Bit: #18, 135° Split Point, TiN-Coated HSS, NAS 907 Type B (MPN 41688)
CHICAGO-LATROBE Jobber Length Drill Bit: #47, 135° Split Point, TiCN-Coated HSS, NAS 907 Type B (MPN 43717)
CHICAGO-LATROBE
CHICAGO-LATROBE Jobber Length Drill Bit: #47, 135° Split Point, TiCN-Coated HSS, NAS 907 Type B (MPN 43717)
CHICAGO-LATROBE Jobber Length Drill Bit: #13, 135° Split Point, TiAlN-Coated HSS, NAS 907 Type B (MPN 42683)
CHICAGO-LATROBE
CHICAGO-LATROBE Jobber Length Drill Bit: #13, 135° Split Point, TiAlN-Coated HSS, NAS 907 Type B (MPN 42683)
CHICAGO-LATROBE Jobber Length Drill Bit: 2.1 mm, 135° Split Point, Black Oxide HSS, NAS 907 Type B (MPN 45812)
CHICAGO-LATROBE
CHICAGO-LATROBE Jobber Length Drill Bit: 2.1 mm, 135° Split Point, Black Oxide HSS, NAS 907 Type B (MPN 45812)
CHICAGO-LATROBE Jobber Length Drill Bit: 135° Split Point, Black Oxide HSS, NAS 907 Type B (MPN 45784)
CHICAGO-LATROBE
CHICAGO-LATROBE Jobber Length Drill Bit: 135° Split Point, Black Oxide HSS, NAS 907 Type B (MPN 45784)
CHICAGO-LATROBE Jobber Length Drill Bit: Letter R, 135° Split Point, TiN-Coated HSS, NAS 907 Type B (MPN 41788)
CHICAGO-LATROBE
CHICAGO-LATROBE Jobber Length Drill Bit: Letter R, 135° Split Point, TiN-Coated HSS, NAS 907 Type B (MPN 41788)
CHICAGO-LATROBE Jobber Length Drill Bit: 5 mm, 135° Split Point, Black Oxide HSS, NAS 907 Type B (MPN 45843)
CHICAGO-LATROBE
CHICAGO-LATROBE Jobber Length Drill Bit: 5 mm, 135° Split Point, Black Oxide HSS, NAS 907 Type B (MPN 45843)