Perth · Karratha · Dampier · North West Shelf
Drawing-led replacement bolting for offshore equipment and coastal maintenance scopes. State seawater exposure and any cathodic protection requirements.

UNS N05500 / ENGINEERED SUPPLY
Headed bolting for drawing-controlled equipment, marine assemblies and oil & gas maintenance. UNS N05500, with condition and inspection defined before supply.
Request a K-500 QuoteBUY-TO-ORDER · QUOTED LEAD TIME · AUSTRALIA-WIDE
ONE ALLOY. TWO ASSEMBLY TYPES.
Monel K-500 adds aluminium and titanium to the nickel-copper alloy system, enabling age hardening. The material condition matters as much as the alloy designation: it determines the properties your joint design relies on.
Head style, across-flats dimensions, grip length, overall length and full or partial thread. Include your drawing revision, service conditions and acceptance criteria. EMG manages supply through qualified manufacturing partners, with feasibility and records agreed before order.
Explore the K-500 material reference

THE WHOLE JOINT MATTERS
Matching markings are not enough. Specify the nut alloy, thread fit, proof or mechanical requirements, and inspection scope as part of the complete assembly. Monel 400 nuts are not an automatic substitute for K-500 nuts.
No blanket NACE approval is implied. Your materials engineer must assess condition, hardness, environment and applicable NACE MR0175 / ISO 15156 requirements. Subsea and cathodically protected applications also require project-specific assessment.
AUSTRALIAN OIL, GAS & LNG
One technical enquiry path for Australian project teams. EMG accepts Monel K-500 bolt and stud requirements nationally; the project specification governs selection, and sourcing and delivery are confirmed per quote.
Perth · Karratha · Dampier · North West Shelf
Drawing-led replacement bolting for offshore equipment and coastal maintenance scopes. State seawater exposure and any cathodic protection requirements.
Darwin · Middle Arm · Bonaparte Basin
LNG and offshore campaign enquiries: include equipment tags, wet-service conditions, required records and your nominated delivery point.
Gladstone · Curtis Island · Surat & Bowen basins
LNG, gas gathering and compression equipment requirements. Quote the operator's specified alloy and condition, not a presumed substitute.
Gippsland · Bass Strait · Geelong
Legacy equipment and life-extension scopes: send the original drawing, thread form and revision so replacement geometry can be reviewed.
Cooper Basin · Moomba · Port Bonython
Gas-processing and terminal maintenance enquiries. Include process exposure and hardness requirements for engineering review.
ENGINEERED SUPPLY, NOT OFF-THE-SHELF
Head style, across-flats dimensions, grip length, overall length and full or partial thread.
UNS N05500, heat-treated condition, hardness criteria, process environment and any project-specific sour or subsea requirements.
Quantity, delivery postcode, required date, EN 10204 3.1 / 3.2 records and any PMI, mechanical testing or witness inspection.
TECHNICAL QUESTIONS
YOUR NEXT PROJECT
Attach a drawing or line list and tell us the required condition, quantity and site date. Your quote confirms the product specification, documentation and lead time.
OVERALL ENQUIRY RANGE: 1/4"–6" / M5–M150
K-500 size and condition feasibility confirmed per RFQ.
SPECIFICATION REFERENCES
Reference scopes are not a claim of certified conformity. The purchase specification and supplied records govern.
MONEL is a trademark of Special Metals. Photographs show supplied product examples, not current inventory or proof of certified material condition.