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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Customer Reviews

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Ordered on a Monday evening and arrived in New Zealand Friday afternoon. Very good prompt service and the compass was installed on the Saturday after calibration. Thanks Military Fasteners!

5.0

Awesome customer service !

5.0

Tanks for the fantastic service. I ordered over the new year period and was amazed my shipment arrived so fast, all the way to New Zealand. Less than a week and that included clearing Customs. Awesome!!

5.0

Ive been purchasing aircraft parts and hardware from Military Fasteners for over 4 years. That alone should speak volumes. Ive always received excellent customer service and the product quality is unrivaled. When I think of aircraft parts and accessories, Im thinking Military Fasteners. Keep up the excellent work folks! Regards, Ed

5.0