Machine Screw P/N NAS1633-20D

Specifications

Screw material

Steel Comp 4140 or Steel Comp E4340 or Steel Comp 6150 or Steel Comp 8735 or Steel Comp 8740 or Steel Comp 4037

Thread class

3A

Thread direction

Right-Hand

Thread length

0.251–0.301 in

Nominal thread diameter

Inches 0.190

Thread quantity per inch

32

Minimum tensile strength

Pounds Per Square Inch 160000

Hardness rating

Rockwell C Minimum 36.0 and Rockwell C Maximum 40.0

Head diameter

0.357–0.373 in

Fastener length

1.511–1.541 in

Screw material document and classification

MIL Spec 1ST Material Response -IL-S-5626 or MIL Spec 2ND Material Response -IL-S-5000 or MIL Spec 3RD Material Response -IL-S-8503 or MIL Spec 4TH Material Response -IL-S-6098 or MIL Spec 5TH Material Response -IL-S-6049 or Assn STD 6TH Material Response A-S 6300

Screw surface treatment

Cadmium and Chromate

Screw surface treatment document and classification

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

Head height

0.122–0.133 in

Thread series designator

Unified National Joint Fine (Unjf)

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

Cross-reference part numbers

NAS1633-20D

Also referenced as

LS5938-3-20

Older, superseded, advisory or drawing numbers the federal catalog associates with this NSN — the ones in an old manual.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	Z Insurance/numeric stockage objective — held by the government as insurance stock for contingencies, not for routine issue. SECO has 2 on the shelf
Unit of issue	EA each
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 5305-00-443-6797?
NSN 5305-00-443-6797 (5305004436797) — Machine Screw: SECO Parts has 2 in stock in Augusta, GA, on our own shelf. It is the NATO Stock Number for machine screw in federal supply class 5305 (Screws).

Is NSN 5305-00-443-6797 available?
SECO Parts has 2 in stock in Augusta, GA — order or request a quote below.

How much does NSN 5305-00-443-6797 cost?
NSN 5305-00-443-6797 is a low-cost part, so SECO quotes it by the line rather than by the piece: there is a $50 minimum per line, and quantity pricing on request — usually answered the same business day.

What part numbers cross-reference to NSN 5305-00-443-6797?
Part numbers that cross-reference this NSN include NAS1633-20D. It is also referenced by older, superseded or advisory numbers: LS5938-3-20. SECO can quote against any of them.