Part Number
Pipe Nipple · ASTM standard · NSN 4730-01-326-4459
| Part number | ASTM-A312 |
|---|---|
| Specification family | ASTM standard |
| Item name | Pipe Nipple |
| Alternate references | ASTM-A312-NIPPLEPIPE316; 1 X CLOSE; NIPPLEPIPE316 |
| Unit of issue | EA |
| Cross-referenced NSN | 4730-01-326-4459 |
| Federal Supply Class (FSC) | 4730 — Fittings and Specialties; Hose, Pipe, and Tube |
| Unit price (USD) | $175.23 |
| Country of origin | Türkiye (Turkey) |
| Lead time | Within 90 days of order |
| Minimum order | May apply — confirm on quote |
| Documentation | Source documentation provided on all orders |
Characteristics decoded from the federal cataloging record for this pipe nipple. Confirm controlling dimensions against your drawing or standard sheet before ordering.
| Material | Steel Comp 316 Overall |
|---|---|
| Thread Series Designator | Npt 1St End |
Fluid-line connection hardware including tube and pipe fittings, adapters, elbows, tees, unions, couplings, nipples, and bushings used to join, branch, and terminate hose, pipe, and tube.
A close-length 316 stainless steel pipe nipple with external threads.
Reading the part number. ASTM-A312 cites ASTM standard A312. ASTM references on hardware records identify the governing material or dimensional standard; the NSN record identifies the exact pipe nipple supplied.
Price in context. Across the 342 items we currently stock in FSC 4730 (Fittings and Specialties; Hose, Pipe, and Tube), published unit prices run from $0.38 to $12,000.00. At $175.23, this item sits well above the class median of $26.28 — typical of assemblies and higher-value line items in this class.
Who orders ASTM-A312. Aircraft owners and MRO shops replacing standard hardware, machine shops and OEMs filling a bill of materials, and government contractors sourcing against NSN 4730-01-326-4459. You can order by part number or by stock number — it is the same item, the same published price, and the same quote form.
Applicable standards. MS/AN flare and flareless fittings, SAE J514, MIL-DTL; steel, stainless, brass, and aluminum.
Need this part modified, or a similar part made to your print? See our U.S.-based CNC machining services and aerospace machining capability.
Country of origin: Türkiye (Turkey) — a DFARS qualifying country. Türkiye is a NATO ally with a reciprocal defense procurement agreement with the U.S. Department of Defense, making it a qualifying country under DFARS 225.003. On DoD and DLA solicitations, qualifying-country end products are evaluated without Buy American price penalties — they compete on par with domestic product — and DoD trade-agreements clauses (DFARS 252.225-7021) expressly accept qualifying-country end products.
Dollar thresholds. The Trade Agreements Act only applies to supply contracts at or above $174,000 (the WTO GPA threshold effective March 2026); below that — where the vast majority of hardware buys fall — the TAA does not apply at all. The main exclusion is civilian-agency solicitations at or above that threshold that restrict award to TAA designated-country products (Türkiye is not TAA-designated). Buyers are responsible for confirming the origin requirements of their specific solicitation.
Full country-of-origin and source documentation is provided with every order. Fulfillment within 90 days of order. Minimum order may apply.
Items are supplied as stock mil-spec / commercial hardware with source documentation and country-of-origin paperwork on every order. Parts are not supplied with an FAA Form 8130-3 airworthiness tag unless expressly stated on the quote. Buyers installing hardware on certificated aircraft are responsible for acceptance under their own maintenance program, repair station procedures, or owner/operator authority.
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