GS551P4-921

Screw

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Description:

Fastener Length: 1-9/32", Thread: 1/4-28, Thread Length: 27/64"

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GS551P4-921 Datasheet Features and Specification

Thread Class:
2a
Thread Direction:
Right-hand
Thread Length:
0.406 inches minimum and 0.436 inches maximum
Fastener Length:
1.266 inches minimum and 1.296 inches maximum
Head Style:
Flat countersunk
Head Diameter:
0.357 inches nominal
Shoulder Diameter:
0.254 inches minimum first shoulder and 0.256 inches maximum first shoulder
Shoulder Length:
0.796 inches minimum first shoulder and 0.826 inches maximum first shoulder
Internal Drive Style:
Slot
Thread Diameter:
0.250 inches
Thready Qty Per Inch (tpi):
28
Countersink Angle:
99.0 degrees minimum and 101.0 degrees nominal
Shoulder Shape:
Round first shoulder
Special Features:
Half of top surface of head painted orange
Material:
Steel comp 4037 overall
Surface Treatment:
Cadmium overall and chromate overall
Surface Treatment Specification:
Qq-p-416,type 2,class 3 fed spec single treatment response overall
Thread Series Designator:
Unf
Quick Specs
Thread Size 1/4
Thread Qty 28
Material Steel
Length 1-9/32

Additional Information

SKU / Model: GS551P4921
NSN: 5305-00-151-8660
FSC: Screws / 5305
Product Series: GS551P4
Pack Weight (Approx.) 0.000 lb
Minimum Qty (MOQ): 5 EA
Schedule B: 7318.15.6080
ECCN: 9A991
National Motor Freight: 093486, Bolts,nuts Or Screws, Noi (sub 3)
Download PDF Version
GS551P4-921_Military-Fasteners-com.pdf
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More GS551P4 machine screws

GS551P4-801

Fastener Length: 1-5/32", Thread: 1/4-28, Thread Length: 7/16"

GS551P4-741

Fastener Length: 1-3/64", Thread: 1/4-28, Thread Length: 3/8"

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After an extensive look for parts, Ramona Real of Military Fasteners was the one that could help in finding what I needed and provide the necessary paperwork to go with it. Shipping on time and packing perfect. Good people to work with and highly recommended A+++++

5.0

I was looking for hard to find parts for a safety critical application. The first couple of places I tried had the part on their web page but when I tried to order it they said, sorry, they did not actually have the parts. I called Military Fasteners. Talked to an employee without delay. She looked up the part number, told me who manufactured them (important), where the company is located (very important) and shipped the parts immediately from their own inventory. Super nice, helpful, efficient and knowledgeable. They get it.

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fantastic customer service. have ordered multiple times for certified hardware. nice website for ordering

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