3M1277E4D4A

Bolt

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Description:

Fastener Length: 11/16", Thread: 1/4-28, Thread Length: 7/16"

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3M1277E4D4A Datasheet Features and Specification

Thread Class:
3a
Thread Direction:
Right-hand
Thread Length:
0.410 inches minimum and 0.440 inches maximum
Fastener Length:
0.660 inches minimum and 0.690 inches maximum
Head Style:
Fillister countersunk
Head Diameter:
0.265 inches minimum and 0.272 inches maximum
Head Height:
0.057 inches nominal
Grip Diameter:
0.2646 inches minimum and 0.2651 inches maximum
Thread Diameter:
0.250 inches
Grip Length:
0.240 inches minimum and 0.260 inches maximum
Thready Qty Per Inch (tpi):
28
Countersink Angle:
99.0 degrees minimum and 101.0 degrees maximum
Criticality Code Justification:
Agav
Part Name Assigned By Controlling Agency:
Bolt,100 deg reduced head,gear drive recess,inconel 718 (125 ksi shear),0.0156 inch oversize
Special Features:
Internal drive recess per nas 1800
Material:
Nickel alloy 718 overall
Material Specification:
Ams 5662 assn std single material response overall
Surface Treatment:
Passivate overall
Surface Treatment Specification:
Mil-l-87132,ty 1,gr b mil spec single treatment response overall
Supplementary Features:
0.076 inch dia cotter pin hole at the tip of the bolt 0.106 inch from the end
Thread Series Designator:
Unjf
Quick Specs
Thread Size 1/4
Thread Qty 28
Material Nickel
Length 11/16

Additional Information

SKU / Model: 3M1277E4D4A
NSN: 5306-01-536-4429
FSC: Bolts / 5306
Pack Weight (Approx.) 0.000 lb
Minimum Qty (MOQ): 1 EA
Schedule B: 7508.90.5000
ECCN: EAR99
National Motor Freight: 093486, Bolts,nuts Or Screws, Noi (sub 3)
Download PDF Version
3M1277E4D4A_Military-Fasteners-com.pdf
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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

Products are military grade MIL-SPEC as advertised. I was able to locate #10 locking counter-sunk nutplates when ALL other locations, including Aircraft-Spruce, could not supply.

5.0

Another good experience with Military Fasteners, and our Sales Rep, Dan Hunter. We needed hardware for an older aircraft model, and Dan's expertise was exceptional. He quickly identified fasteners, even for parts with unclear descriptions, and provided invaluable technical assistance. The supporting data was spot-on, verified by our technicians. Despite finding slightly lower prices elsewhere, the unmatched service and expertise from Military Fasteners, particularly Dan, make them our preferred choice. Our order was delivered ahead of schedule. Highly recommend MilFast for top-notch service and technical support!

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Nothing but a top rating.

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