Close Tolerance Bolt P/N AN173H16A

Specifications

Nominal thread diameter

Inches 0.190

Thread length

0.406 in minimum

Thread class

3A

Material

Overall Steel Comp 8740 or Steel Comp 8630 or Steel Comp 8735 or Steel Comp 4140 or Steel Comp 4130 or Steel Comp 4037

Material document and classification

Overall MIL Spec 1ST Material Response -IL-S-6049 or MIL Spec 2ND Material Response -IL-S-6050 or MIL Spec 3RD Material Response -IL-S-6098 or MIL Spec 4TH Material Response -IL-S-5626 or MIL Spec 5TH Material Response -IL-S-6758 or Assn STD 6TH Material Response A-S 6300

Fastener length

1.781 in (nominal)

Surface finish

Bearing Surface of Head Microinches 63.0

Surface finish

Grip Microinches 63.0

Thread direction

Right-Hand

Width between flats

0.365–0.377 in

Hole diameter

0.046 in (nominal)

Surface treatment document and classification

Overall Fed Spec Single Treatment Response QQ--416,TY 2,CL 3

Thread series designator

UNF

Hole type

Drilled

Thread quantity per inch

32

Minimum tensile strength

Pounds Per Square Inch 125000

Grip diameter

0.1889–0.1894 in

Hole quantity

1

Hardness rating

Overall Rockwell C Minimum 26.0 and Rockwell C Maximum 32.0

Head height

0.109–0.141 in

Grip length

0.375 in (nominal)

Surface treatment

Overall Cadmium and Chromate

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

Cross-reference part numbers

AN173H16A

Also referenced as

AN173-16A

Older, superseded, advisory or drawing numbers the federal catalog associates with this NSN — the ones in an old manual.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 1 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 5306-00-550-3406?
NSN 5306-00-550-3406 (5306005503406) — Close Tolerance Bolt: SECO Parts has 1 in stock in Augusta, GA, on our own shelf. It is the NATO Stock Number for close tolerance bolt in federal supply class 5306 (Bolts).

Is NSN 5306-00-550-3406 available?
SECO Parts has 1 in stock in Augusta, GA — order or request a quote below.

How much does NSN 5306-00-550-3406 cost?
SECO typically prices parts like NSN 5306-00-550-3406 at $35–$75 each: an estimate from the government catalog price and what SECO has charged for similar parts. It is not a quote — request one for your price, usually answered the same business day. Quote lines carry a $50 minimum.

What part numbers cross-reference to NSN 5306-00-550-3406?
Part numbers that cross-reference this NSN include AN173H16A. It is also referenced by older, superseded or advisory numbers: AN173-16A. SECO can quote against any of them.