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1/4" Brass Square Chassis Fastener

Part ID: BR6991B-61

Technical Specifications

Material
Grade (Alloy):
Brass
360 (ASTM-B-116, QQ-B-626)
353 (ASTM-B-116)
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) Nickel
(AMS-QQ-N-290)
Compliant To WEEE, REACH, Conflict Minerals

Available Finishes

Code Description Specification Quantity Available
00 Unplated Plain 0
03 Bright Dip ASTM B 281 0
31 Clear Cadmium SAE-AMS QQ-P-416 21
32 Yellow Cadmium SAE-AMS QQ-P-416 0
33 Black Zinc ASTM B633 0
34 Zinc Clear Chromate with Blue Tint ASTM-B633 118
35 Zinc Clear ASTM-B633 0
36 Zinc Yellow Chromate ASTM-B633 0
37 Zinc Yellow ASTM-B633 0
42 Electro Tin - Dull with Copper Flash ASTM B 545 600
43 Electro Tin - Bright ASTM B 545 -4,270
48 Copper-Nickel-Bright Tin ASTM B545 0
51 Black Oxide MIL-F-495 0
52 Black Oxide MIL-C-13924 0
61 Nickel AMS-QQ-N-290 42
63 Ductile Nickel SAE-AMS-QQ-N-290 0
66 Electroless Nickel SAE AMS-C-26074 0
91 Silver QQ-S-365 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. Brass is corrosion resistant, nonmagnetic, and easily machinable. Base metal is yellow, but many plating options are available when different colors are required.

Stock and Lead Time

Stock 42 Same Day
Stock to Plate 0 2 to 3 weeks
Manufacture Lead Time 12-13 Weeks

Pricing as Nickel

Quantity Online Price
100 3.761
250 2.318
500 1.668
1,000 1.190
2,500 0.944
5,000 0.809
10,000 0.672
25,000 0.591
50,000 0.509

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To order, please send a purchase order to info@lyntron.com or contact your local distributor. Orders may be adjusted to meet line and/or order minimums. See general terms for details.