Setscrew P/N MS51977-74

Specifications

Thread length

0.490–0.510 in

Hardness rating

Overall Rockwell C Minimum 45.0 and Rockwell C Maximum 53.0

Surface treatment

Overall Cadmium and Chromate

Surface treatment document and classification

Overall Fed Spec All Treatment Responses QQ--416 Tye 2 Class 3

Thread series designator

Unified National Coarse (UNC)

Width across flats

0.188 in (nominal)

Fastener length

0.490–0.510 in

Thread class

3A

Nominal thread diameter

Inches 0.375

Thread direction

Right-Hand

Material

Overall Steel Comp 4032 or Steel Comp 4037 or Steel Comp 4137 or Steel Comp 4140 or Steel Comp 8630 or Steel Comp 8740

Material document and classification

Overall Assn STD All Material Responses Aisi

Thread quantity per inch

16

From the federal catalog's item characteristics for this NSN. Confirm critical dimensions against your part or drawing before ordering.

Cross-reference part numbers

MS51977-74

Also referenced as

8840-034REV M ITEM 17 8840-034 ITEM 1 49566-83 SG4077PC6

Older, superseded, advisory or drawing numbers the federal catalog associates with this NSN — the ones in an old manual. They find the item; confirm the current part number when you order.

Shown for identification only. SECO can quote against any of these numbers.

Logistics data

Source of supply	SMS DLA Land and Maritime, Columbus, Ohio
Acquisition advice code	D DLA/GSA stocked — stocked by DLA or GSA and issued from central stock
Unit of issue	PG package
Demilitarization code	A Demilitarization not required — non-munitions-list item
Controlled inventory code	U Unclassified
Hazardous material indicator	N No hazardous material

Source: public FLIS/PUB LOG cataloging data.

Why buy from SECO

These quantities sit on our own shelves — we are a stocking supplier, not a broker sourcing after you order. Condition-coded stock, formal quotes with NSN/PN on the paperwork, POs and GPC welcome, fast U.S. shipping.

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FAQ

What is NSN 5305-00-058-9389?
NSN 5305-00-058-9389 (5305000589389) — Setscrew: SECO Parts has 18 in stock in Augusta, GA, on our own shelf. It is the NATO Stock Number for setscrew in federal supply class 5305 (Screws).

Is NSN 5305-00-058-9389 available?
SECO Parts has 18 in stock in Augusta, GA — order or request a quote below.

How much does NSN 5305-00-058-9389 cost?
SECO quotes NSN 5305-00-058-9389 on request, usually the same business day.

What part numbers cross-reference to NSN 5305-00-058-9389?
Part numbers that cross-reference this NSN include MS51977-74. It is also referenced by older, superseded or advisory numbers: 8840-034REV M ITEM 17, 8840-034 ITEM 1, 49566-83, SG4077PC6. SECO can quote against any of them.