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1/4" Aluminum Square Chassis Fastener

Part ID: AA6991B-21

Technical Specifications

Material
Grade (Alloy):
Aluminum
2011 (ASTM-B-211, QQ-A-225/3)
K211 (ASTM-B-211, QQ-A-225/3)
6061 (ASTM-B-211, QQ-A225/8)
Profile Square
Outside Diameter 1/4"
Overall Length 0.355"
Female Thread #4-40
Chassis Fastener ℄ to front of body: 0.125"
℄ to side of body: 0.125"
Panel Hole Size 0.128-0.131
Shank Length: 0.105"
Outside Diameter: 0.126"
Inside Diameter: 0.150"
Panel Thickness: 1/16"
Code: B
Swage Anvil Code 350-2
Swage Punch Code 126
Finish Desc. (Spec) Clear Iridite
(MIL-DTL-5541)
Compliant To RoHS, WEEE, Conflict Minerals

Available Finishes

Code Description Specification Quantity Available
00 Unplated Plain 0
02 Caustic Etch Caustic Etch 0
12 Clear Anodize MIL-A-8625 0
14 Black Anodize Type II 0
21 Clear Iridite MIL-DTL-5541 0
22 Gold Iridite MIL-DTL-5541 2,246
25 Clear Iridite MIL-DTL-5541F 0

Product Description

A chassis fastener was designed to be attached to the chassis or case of a computer. Like swage standoffs and spacers, these parts are fastened by swaging the part in place for a permanent attachment. The location of the thread in relation to the mounting surface makes these parts unique. As the thread runs parallel to the mounted surface, these fasteners create new anchor points not possible with other hardware. The square allows for maxium torqueing as the four flat sides allow for wrench tightening. Aluminum is widely used in Aerospace applications due to its high strength to weight properties. RoHS certifications available.

Stock and Lead Time

Stock 0 Available
Stock to Plate 0 2 to 3 weeks
Manufacture Lead Time 13-14 Weeks

Pricing as Clear Iridite

Pricing information not available. But you can always request a quote and we'll get back to you.