MS51977-12

Military Standard Setscrew

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Description:

Fastener Length: 5/16", Thread: 4-40, Head Width: 1/16", Thread Length: 5/16"

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MS51977-12 Datasheet Features and Specification

Thread Class:
3a
Thread Direction:
Right-hand
Thread Length:
0.302 inches minimum and 0.322 inches maximum
Fastener Length:
0.302 inches minimum and 0.322 inches maximum
Head Style:
Headless (setscrew)
Point Style:
Half dog
Internal Drive Style:
Hexagon
Thread Diameter:
0.112 inches
Width Across Flats:
0.050 inches nominal
Thready Qty Per Inch (tpi):
40
Hardness Rating:
45.0 rockwell c minimum overall and 53.0 rockwell c maximum overall
Material:
Steel comp 4032 overall or steel comp 4037 overall or steel comp 4137 overall or steel comp 4140 overall or steel comp 8630 overall or steel comp 8740 overall
Material Specification:
66 fed std all material responses 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:
Unc
Nondefinitive Specification/std Data:
1 type and 6 style
Quick Specs
Thread Size 4
Thread Qty 40
Material Steel
Length 5/16

Additional Information

SKU / Model: MS5197712
NSN: 5305-00-926-5620
FSC: Screws / 5305
Product Series: MS51977
Pack Weight (Approx.) 0.000 lb
Minimum Qty (MOQ): 20 EA
Schedule B: 7318.15.8020
ECCN: 9A991
National Motor Freight: 093486, Bolts,nuts Or Screws, Noi (sub 3)
Download PDF Version
MS51977-12_Military-Fasteners-com.pdf
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More MS51977 setscrews

MS51977-87

Fastener Length: 1-1/64", Thread: 1/2-13, Head Width: 1/4", Thread Length: 7/8"

MS51977-30

Fastener Length: 1/4", Thread: 8-32, Head Width: 5/64", Thread Length: 1/4"

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I called the customer service line just before Air Venture at Oshkosh to find out if they would have the parts I needed at their booth. The service rep on the phone was very helpful and was able to check the inventory that was taken to Oshkosh.I was told that the parts would not be available but could be shipped from the warehouse without delay. I ordered a full set of intake seals for a Continental 085 on the spot and they arrived in a few days. I am very happy with the service provided, and will be ordering more parts soon! Thank you Larry

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Hard to find bolts are never hard to find with Military Fasteners!

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I have been a customer since Fullerton Air Parts (Flo Irwin). That should speak volumes of the service I have received from Military Fasteners. In the early days, I had a variety of planes and was based out of Orange County Airport. At the time, the airport was surrounded by bean fields. I, and some of my friends, would frequently fly into Fullerton airport for lunch, the pick up whatever supplies we needed from Flo. She was a great lady, and I am glad that she passed on such a wonderful legacy. I am certain that she would be very proud of what she started, and proud of you all for building on her meager beginnings.

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Military Fasteners always seems to get the order correct and delivered when expected. I this day and age, this is high praise.

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